So what do we actually see in the trailer? Let's take a look. Warning: Potential spoilers, definite geekiness ahead.

SHOT 1

New York, New York. After taking us to Los Angeles, Rio, New Mexico, and war-torn Europe, Marvel's finest finally come home to the city where they were all born. This shot practically screams for a Stan Lee, "Listen up, True Believers!" voice-over.

SHOT 2

Things shift from serene to pear-shaped pretty quickly, though. Is that "Aussie Bum" banner in the background a slight wink at the hunky - and likely shirtless - Chris Hemsworth? We like to think so.

SHOT 3

BOOM! We don't have high hopes that Officer O'Donuts there makes it to the sequel.

SHOT 4

The guy on the far left is S.H.I.E.L.D. Agent Coulson - the glue that ties together all the individual movies (his cameos in "Iron Man" and "Thor" are memorable) and the man in charge of shepherding the superpowered do-gooders into, well, this movie. But who's in the copter?

Banner, meanwhile, appears to have been seeking spiritual guidance in order to contain his inner beast. We're betting it doesn't last long. We're also secretly hoping this is just a set-up for the whole "Hulk and his harem in Tibet" storyline from the Ultimate comics.

SHOT 9

Rogers works out his "I've been frozen since the 1940s and everyone I know is dead" frustrations out in the S.H.I.E.L.D. gym. This shot was featured in the end credits teaser at the conclusion of "Thor."

SHOT 10

"THOR! <crash> AAA-AAAAAAH! HE'LL SAVE EVERY ONE OF US!"

SHOT 11

A better shot of the deadly (and apparently dangerously flatulent) Black Widow. Johansson's slick super agent made an impressive debut in "Iron Man 2," and will play a major role in the earth-threatening adventure this time around.

SHOT 12

...As will Renner's Hawkeye, previously featured in an extremely brief cameo in "Thor." Like Widow, he isn't super-powered, just very, very skilled. He's got a little chip on his shoulder around his new gamma-irradiated and Norse godly co-workers.

SHOT 13

The man of the hour. Star of not one, but two, blockbuster solo outings, it's Tony "Iron Man" Stark. Note the Black Sabbath T-shirt. Wonder if they have a song that might be appropriate for Tony's iPod?

SHOT 14

We've got the heroes - so who's the Big Bad? You may recognize this guy as Thor's adopted Frost Giant brother Loki. He shows up and looks pissed, but is he alone a big enough threat to require a team of heroes? Especially when his own brother seems more than capable of giving him a celestial time out? We're betting the God of Mischief has something else up his sleeve...

SHOT 15

Geek icon Whedon wasn't about to skimp on one of the most tension-filled working relationships in comics - the one between straight-shooting Boy Scout Captain America and morally-casual egotist Iron Man. Evans and Downey jawing at each other might even be better than the action scenes.

SHOT 16

Only one of them has matching carpet. Not saying which one.

SHOT 17

After a few cameos spent standing around the shadows and pontificating, we will finally see Fury in action. And he does not mess around.

SHOT 18

Hawkeye dodges...purple lasers? That doesn't seem very Loki-like, does it? Take a look at this [SPOILER] photo taken by a fan from the Avengers set and then take a look at this pic from the recent "Marvel Boy" comic about a member of the Kree alien race who lands on earth. Hmmm...are the Avengers fighting the Kree? Or are they fighting the Kree's nemeses, the shape-shifting, goblin-faced Skrulls? Or are they fighting BOTH? Remember from the "Thor" movie that Loki's pretty good at instigating wars...

SHOT 19

Or perhaps they are fighting...each other? Thor vs. Cap - Who ya got?

SHOT 20

Lending credence to the alien invasion notion is this bizarre ship. Is this a S.H.I.E.L.D. transport or something else? Note the "STARK" logo on the high-rise in the middle...